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  #1  
Old 06-29-2010, 10:10 PM
mcencula mcencula is offline
 
Join Date: Jul 2007
Location: Delaware, OH
Posts: 435
Default How to spend a day doing a 5 minute job

Well today was time to start working on the vent lines in the fuselage. I've always known that I wanted to do something a little fancier than the "cut a bulkhead fitting at 45 degrees", so here's a picture story of what I ended up with.

Starting materials:


Thinning out the nut:


Turn down the diameter:


Hack out a little "airfoil" from the chunk of aluminum:


Notch the two parts...


...and press them together:


Trim off the requisite 45 degree angle:


A pass with the buffing wheel and this is whatcha get:


...and that, my friends, is how you blow a day doing a five minute job.
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Mike Cencula
RV-7A (fuselage)
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Betcha my pile-o-scrap is bigger than your pile-o-scrap.
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  #2  
Old 06-29-2010, 10:14 PM
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boom3 boom3 is offline
 
Join Date: Dec 2006
Location: Sumner, WA
Posts: 722
Default

Sweet!!!!!

Maybe you can turn them a little for rudder trim.
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Sumner, WA
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  #3  
Old 06-29-2010, 10:37 PM
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flyboy1963 flyboy1963 is offline
 
Join Date: Oct 2008
Location: Lake Country, B.C. Canada
Posts: 2,416
Default time well wasted!?!?

Man, I wish I had that urge!.......( or maybe not?)

don't forget a little screen to keep the bugs out!
...and....
I'm going to be content with thinking that this is an area of turbulent flow, so my stock ugly vents aren't even noticed by the air molecules.!

( but yours are so much nicer to blow into, to check the vent during your walk-around.
What.

...everyone does that, right?
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Perry Y.
RV-9a - SOLD!....
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  #4  
Old 06-30-2010, 12:04 AM
gasman gasman is offline
 
Join Date: Mar 2007
Location: Sonoma County
Posts: 3,821
Default

But don't you need two?
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  #5  
Old 06-30-2010, 01:30 AM
vickruis vickruis is offline
 
Join Date: Dec 2007
Location: Breda, The Netherlands
Posts: 42
Default Thanks...

Now I can never again look at my bulkhead fittings, and not wondering how my belly would look like with your fittings!
See you in a few weeks at OSH.
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Victor Kruis
RV7A
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  #6  
Old 06-30-2010, 04:33 AM
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panhandler1956 panhandler1956 is offline
 
Join Date: Jun 2006
Location: Ohio
Posts: 1,686
Default Nice!

Mike,
That's a cool mod! Even though this does drag out the project alittle in the end those sort of details are what set some airplanes apart.

Plus you have to admit you enjoy this stuff, must be the engineer in ya.....

See ya Thursday Mike!

Brent
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RV-8 'Contrary Mary' flying
N784DE S/N #82614

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  #7  
Old 06-30-2010, 05:19 AM
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Fearless Fearless is offline
 
Join Date: Aug 2006
Location: Crestwood, KY
Posts: 848
Default Sweet

Just don't park next to me at a flyin or ramp someplace.

I am so not worthy.
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RV-9A Based K6I2
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  #8  
Old 06-30-2010, 05:58 AM
Bob Axsom Bob Axsom is offline
 
Join Date: Mar 2005
Posts: 5,685
Default I have been planning the same thing

I have been planning the same thing but it hasn't got to the top of my drag reduction potential list yet. It is getting there. I was thinking of splitting the trailing edge before shaping the airfoil then drilling, countersinking and tapping for a flathead compression screw.

Bob Axsom

P.S. I made some fairings for the fuel drains and saw no measurable difference in speed.

Last edited by Bob Axsom : 06-30-2010 at 09:59 AM.
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  #9  
Old 06-30-2010, 06:40 AM
N427EF N427EF is offline
 
Join Date: Oct 2005
Posts: 1,516
Default Adding Drag

Seems that you have added drag to the project completion date but reduced drag from the aircraft....
Perhaps you could add a couple of mini vortex generators to that little airfoil.
I'll never be happy looking at my aluminum tube sticking out so crudely from
the bottom of the plane.
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RV-8 finished (sold)
RV-10 Flyer 600 plus hours
Running on E10 mogas
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  #10  
Old 06-30-2010, 07:46 AM
mcencula mcencula is offline
 
Join Date: Jul 2007
Location: Delaware, OH
Posts: 435
Default Thanks...

...for the nice comments. Brent has it right...I enjoy these kind of little details.

Victor,

Can't wait to see you and Ilse at OSH. :-)
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RV-7A (fuselage)
www.our7a.com
Betcha my pile-o-scrap is bigger than your pile-o-scrap.
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